Urgent help needed-Someone has taken my cabin luggage at Heathrow and is in Kenya

I’m asking this question to get some urgent advice regarding a recent incident.

I was travelling from London Heathrow to New Delhi on 15th May 2026. In the security check area, someone took my cabin luggage and left behind theirs.

I informed a security manager at Heathrow but they weren’t helpful and they didn’t seem to have much power to do anything. However, they identified that a woman has taken my bag and left behind hers.

Using my find my app I can see the cabin bag is in a place in Kenya.

That cabin bag is my life-it has a folder containing all my important documents and my laptop in which some important files are not backed up. I never expected to lose my cabin bag as the idea is that it’s supposed to be with you at all times.

I’m unsure what my next steps should be. I’ve raised a complaint with Heathrow airport but it seems the same security managers will handle it and I don’t have much hope. I’ve tried contacting British Airways but they weren’t helpful either.

I expect the lady will try to contact Heathrow to try to get back her bag and if she’s thoughtful she will return my bag to Heathrow but I’m worried she might not do this.

Please could people recommend what I should do. Should I raise a police complaint in Kenya and if so, how? It seems very hard to find it online. Also, are there any other steps I should take?

Many thanks.

EDIT: I think I forgot to mention that the bag she left behind was silver in colour and my one black which makes me somewhat suspect that it could be an intentional theft dressed as a mixup to reduce suspicion. I’m made a uk police report regarding this.
I would appreciate advice on both possible cases-if it’s intentional or unintentional.